reset security code on nokia 1100

heyy, ok my wife has a nokia 1100 and has forgoten the security code for it.ive tried the default code 12345 but it doesnt work. could someone please the imei number is 35882400/972952/7 as writen at the back of the phone. is there anyway to reset the security code. dont have to worry about the contacts i can put them back on later.